Communication control apparatus, communication control method, and computer program
a communication control and control method technology, applied in the field of communication control apparatus, communication control method, computer program, can solve the problems of large computation load and the need to control the transmission rate, and achieve the effect of small computation load, reduced computation load to be imposed on the control block, and control of the transmission ra
Active Publication Date: 2012-01-31
CANON KK
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- Abstract
- Description
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- Application Information
AI Technical Summary
Benefits of technology
Enables efficient control of transmission rates in a global or local manner without the need for high-frequency and high-accuracy clocks, reducing computation load and maintaining equivalent control performance.
Problems solved by technology
In the methods described above, however, it is necessary to control the transmission rate in a stepless manner.
Thus, a problem occurs in that a large computation load is required for designating the transmission start times.
Method used
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Embodiment Construction
[0021]Embodiments of the present invention will be described with reference to the drawings.
[0022]FIG. 1 shows an example of the configuration of a communication control apparatus 200.
[0023]Referring to FIG. 1, the communication control apparatus 200 includes an encoding device 201, a packetizing device 202, a packet scheduler 203, a network interface card (NIC) 204, a control device 205, and an input terminal 206.
[0024]A digital moving image signal is received at the input terminal 206. The encoding device 201 codes the digital moving image signal into a specific coding format and outputs, as a coded digital moving image signal, to the packetizing device 202. A digital audio signal, as well as a digital moving image signal, may be received at the input terminal 206.
[0025]FIG. 2 schematically shows an example in which a coded digital moving image signal is packetized by the packetizing device 202.
[0026]As shown in FIG. 2, coded digital moving image signals 301a and 301b input to the...
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A communication control apparatus includes a packetizing unit configured to generate packets based on coded data; a calculating unit configured to calculate, based on at least one of information regarding the amount of code of the coded data, reception state information indicating a reception state of a reception device serving as a transmission destination to which the packets are to be transmitted, information regarding the effective speed of a communication line to be used for transmission of the packets, and information regarding an available capacity of a communication channel that can be ensured for communication of the packets, the number of packets to be continuously transmitted; and a transmitting unit configured to continuously transmit, via the communication line to the reception device, packets corresponding to the number of packets calculated by the calculating unit.
Description
BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a communication control apparatus, a communication control method, and a computer program, and more particularly, to a communication control apparatus, a communication control method, and a computer program that are suitably used for controlling the transmission rate in the case of transmitting packets.[0003]2. Description of the Related Art[0004]As a method for controlling the transmission rate in a global or local manner, a method for controlling transmission intervals for individual packets in accordance with a high-accuracy clock has been proposed, for example, in Japanese Patent Laid-Open No. 2003-169090.[0005]In addition, a method for adjusting the amount of data to be transmitted per unit time so that the traffic varying in a local manner does not exceed a line capacity has been proposed. For example, Japanese Patent Laid-Open No. 2006-87010 describes that a transmission-stoppage ...
Claims
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IPC IPC(8): H04J3/06
CPCH04L47/10H04L47/30H04L49/90
Inventor HAMANAKA, AKIYOSHISUNEYA, TORU
Owner CANON KK